Attachment for flat-knitting machines



y 21, 1929. R. E. SCHLETTER ATTACHMENT FOR FLAT KNITTING MACHINES Filed Nov. 5. 1925 4 Sheets-Sheet 1 May 21, 1929. R. E. SCHLETTER ATTACHMENT FOR FLAT KNITTING MACHINES Filed Nov. 5. 1925 4 Sheets-Sheet 2 y 1929. R. E. SCHLETTER 1,713,

ATTACHMENT FOR FLAT KNITTING mcrmms Filed Nov. 5. 1925 4 Sheets-Sheet 3 y 1929- R. E. SCHLETTER 1,713,628

ATTACHMENT FOR FLAT KNITTING MACHINES Filed Nov. 5. 1925 4 Sheets-Sheet 4 ioning designs, as clocks, upon said hosiery.

Patented May 21, 1929.

UNITED STATES 1,713,628 PATENT' OFFICE.

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lubltitute for abandoned application Serial Io. 569,558, filed June 10, 1988.

November 5, 1925. Serial Io. 68,91.

This invention, generall stated, has relation to fiateknittin hosiery of full fashioned type and has more particular relation to an attachment for fash- This application "is a substitute for my abandoned application No. 569,559 filed June 19,1922;

Commercially considered, two types of clocked hosiery are in use. In one type clocks are of open work, termed clocklace, and stockings of this ty e, being relatively fragile, are not suited or all occasions or everyday use and furthermore are comparatively expensive. The other=type comprises 'hosieryin which clocks are "embroidered thereon. While this type is best suited for every-da use, practice dictates, that, the

' action 0 needles laying-on the embroide 'yarn serves to so weaken the stocking-we as to have a deleterious effect thereon. The embroiderin operation also serves to increase manu acturing costs.

It is'an object of my-invention to provide an attachment for. full-fashioned knitting machines whereby yarn-guides can be accurately controlled to lay a yarn over a distanceless than the full length of a course being knitted, as for reinforcing or for so-' called split-seam work wherein sections of fabric are connected by suture seams. For this purpose I preferably employ opposed stops with conjoint controlling means arranged to move them toward or from each other incrementally, but any equivalent A further object is to provideah'attach,

mentfor a flat knitting machine in which is provided a plurality of thread-carrier rods,-

stop-mechanism for said rods comprisin' a shaft including a screw having reverse'ythreaded portions carrying oppositely-mow able split-seam stops, means for moving said stops from and toward the rods} to effect the split-seam interlooping of adjacent .yarnsections, means including a pattern chain and mac ines for making This application fled reversely-acting pawls for intermittently actuating. said screw in successive courses, and separate means for selectively engaging said pawls.

A still further object is to provide an attachment for a flat knittin machine in which is provided a. plurality of t read-carrier rods,

stop-mechanism for said rods comprising a shaft including a screw, having reversely threaded portions carrying oppositely disposed stops, operating means for moving said stops from and toward the rods to limit variably the stroke of the yarn carrier rods, means including a pattern-chain and oppositely-acting pawls for intermittently rotating said screw in successive courses, and

scope of the invention will be more fully understood from thefollowing description taken in connection with the accompanyin dra'wings forming part hereof, and in whic Fig. 1, is a view in front elevation of a portion of one type offull-fashioned knittin machine known as the Cotton machine wit an attachment of the invention applied thereto,machine parts not essential to the invention being omitted.

Fig. 2, is a plan view thereof.

Fig. 3, is a sectional elevation, taken on the line 3'.3 of Fig. 1, the machine frame outline being indicated indotted lines.

Fig. 4, is an enlarged end view of the stop employed. i

Fig. 5, is an enlarged cross-sectional view of the s cial form of cam employed for intermittent y rotating the clock orming or splitseam screw that operates the stops.

Figs. 6 and 7 are fragmentary views illushating the two pattern chain mechanisms for automatically controlling the movements of the clock formin or s lit-seam screw.

Fig. 8, is a view 0 the'selective control means for engaging the reversely acting pa Fig. '9,i's across sectional showing of the. pawand'ratchet mounting on the screwsha I or split-seam border, line ornamentation as made by means of my attachment; and

Figures 11 and 12, details of means preventing operation of my device siinultaneously with a narrowing stop.

For the purpose of illustrating my invention I have shown in the accompanying drawings two forms thereof which are at present preferred by me, since'the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to theprecise arrangement and organization of the instrumentalities as herein shown and described.

In practice a web of hosiery is knit upon a straight knitting machine equipped with the novel mechanism of the present invention which mechanism is capable of co-acting with respect to the web-forming needles to provide clocks or other ornamental re-inforcements which may be ornamental or useful or both,-

said reinforcements having zig-zag-like lines inclined to the wales and courses of the web. An example of such stocking re-inforcement, other than that shown in Fig. 10, is disclosed in letters patent granted to me under date of March 31, 1925, and numbered 1,531,349 wherein the clocks are made 'by a splicing yarn instead of by split-seam work. In

manufacture, the stocking-web, which has selvage edges, may be knit with a main yarn in a well understood manner to that portion of the leg at which the narrowing operation takes place. At or about the time narrowin of the leg portion is commenced, additional or re-inforcing thread is presented to certain of the Web-forming'needles to'efi'ect formation of a clock or clocks. During formation of a clock or clocks it is to be understood that terial.

fabrication of the stocking-web, including the re-inforced heel portions, takes place in the usual and well understood manner of making full fashioned hosiery. The additional or re-inforcing thread is supplied to the web-forming needles so that zig-zag-like lines, inclined to the wales and courses of the web, are produced to elfect the contour of a clock or clocks. Obviously, depending upon the contour of a clock or clocks desired, the feeding of additional thread varies. In practice I commence the formation of the clock or clocks midway of the narrowing portion of the web although obviously said formation may be started" and stopped at other places and while but one clock may be formed upon a stocking-web, if desired, in practice two or more are preferred, the number being imma- Referring now to the attachment for making a clock or other ornamentation and referringmore especially to Figs. 1 to 9 inelusive, the reference numeral 1 indicates the main frame of a flat knitting machine; 2, the front beam; 3, the back beam; 4, the center bed; and 5, the main cam shaft. Such machine maybe of any well known full fashioned knitting machine type and .to such my novel attachment is connected. These machines are commonly formed with a plurality of knitting sections, each of which is provided with the requisite number of yarn-guides, and the latter are mounted on longitudinally movable yarn carrier rods 6, 6, 6, 6, extending the full length of the machine and their joint movements controlled by rod-contacting stops, not shown, acting in Well known manner at the ends of the machine. My invention, among other things, relates to special stops for these rods 6, 6, 6, 6, affecting the yarn-feed movements thereof, and for simplicity of showing I have indicated in the drawings only the rods themselves, it being understood that they carry thread guides and abutments such as shown in Figs. 11 and 12 and perform their usual functions as heretofore.

The special rod-stops 7, 7 (see Fig. 1) employed in my novel attachment, actin a manner similar to the action of the well known Split-foot stops heretofore employed in making split seam work, which stops however merely oscillated and did not travel lengthwise of the machine. In Figs. 3 and 4 of the drawings the stops are shown as having undercut portions at 10 which are desirable for split-seam Work. My invention however is not limited to the use of these specific stops for this specific purpose but they may be used for all purposes for which stops are used. With the construction illustrated in Fig. 4 it is possible to produce split-seam stitches as in the split-foot stocking for uniting fabric sections by the delayed partial lifting rods determined by the depth of the undercut portions 10 (see Fig. 4) of said stops 7, 7 this additional movement occurring after the formation of the stitches of the course and forming floats of determined length extending into the next succeeding courses of knitting, the effect being toproduce ornamental border line junction seams between fabric sections of the finished fabric.

Stops such as herein illustrated are used for making spliced. or plated figures on a plain fabric and for split seam work, the split seam stops being undercut as in Fig. 4 and the others not undercut as in F lg. 16. It is new to control the stops by conjoint means for moving them toward or from each other to shorten orelengthen the stroke of the same guide at both ends.

Any conventional or desirable lugs, screws or other attachments may be located on the carrier rods for cooperating with the, stops and no claim is made to such defies.

The special stop employed in my novel attachment and the mechanism for o rating the same, as fully described hereina 1', provides for the introduction of this s lit seam anywhere in the length of the fabrlc, for its automatic control by pattern-chain mechanism, and for varying the spreadin of said sto s in successive courses to reverse y incline sai split-seam border lines to the'wales for (stops by cams 14, 14 on cam shaft 5, through levers 1.5, '15. operated thereby and connected byrods 16, 16 to a horizontal bar-17 slidably engagin in the rear extensions 18, 18 'of the stops-7, 7; this rocking movement permitting the laying of thefloats of the split-seam and the depth of the undercut portion 10 determining the number of needles over which the-yarn floats, and rotary movement of the ,s'crew shaft, 11 adjusting theposi'tioifof said stops 7, 7 in opposite dlrect'ions. The points 'where thefab rtments vmounted on the carrier 'rods normally strike the stops 77 are indi: .catedat10',10 (Fig. 4)."

'Thescrew sha t 11, as more clearly. shown inFig'. 9,. has an endextension- 20 fixedly carrying'op'posit'ely toothed ratchet wheels-2'1 and 22, and loosely-strung rockarms 23 and 24. carryingspring=pressed-pawls 25 and 26 adapted -to engage. the respective ratchet wheels 21 and22, a notched-disk 25 (Figs. 3 and .12) and-a detent 2'6 heldyieldably in engagement with the. disk in conventional manner, being preferably employed to pre-.

vent accidental turning movement ofsaid shaft 11. In other words, the screw shaft 11 may be positively moved backward or'forwardby the ratchet wheels 21 and 22 but said shaft, by reason of the teeth upon said disk 25", is locked against accidental turning movement at all times". (See Figs. 1' and 3.) Pattern-control means, hereinafter fully described, determines the selective engagement of the pawls, and connectinglinks 27 and 2.8 (see Fig. 8') respectively connect the mockarms 23 and 24 (see Fig.2) to actuatin levers 29 and 29. Rollers '30 and 31'(see igs. 1 and 5) having a limited longitudinal move ment on their respective lever-carrier studs 32 and 33, are adapted to ride upon special cams'on cam shaft'5, said cams having idle paths 34 and 35 and active paths 34 and-35 for the respective jrolle'rs, (see Fig. 5) to cause intermittent rotation of the screw shaft 11 as desired. Arms 40 and 41 loosel "engaging the hubs of rollers30 and 31 an car ried by horizontal shaft 42, jointly move said mittent rotation of screw shaft 11, I employ,

and 7) to which step-by-step movement is imparted from cam shaft 5 throu h cam 51 and link connected lever 52, (see E g. 1) the latter havin teeth of c ain supporting wheel'54. Studs on said chain are ada ted to act upon a lever 56, carrying a shaft latch-member' 57 to raise and lower the latter. as best shown in Fig. 7, slidably bears against a fixed shaft-supporting bracket 58, and-when in lowered position the wide part of the latch engages a collar 59 fixed on said shaft 42 to hold the shaft 42 and its arms in a position where the rollers 30 and 31 are on the idle faces 34 and 35 of the cams.

a pawl 53 acting on the ratchet ,as shown, a pattern chain! 50, (seeFigs. '1, 2

This latch 57,

\Vhen a stud 55 on said chain 50'lifts lever 56 and its shaft latch member 57 ,the reduced lower end 60 of the latch 43; to move said shaft until the rollers 30 and 311ride on the active paths 34",'and 35, of

'gtheir respective cams. Upon the passing of the stud 55, the wide part of the latch member 57 will fall again into engagement with -collar 59, when the shaft 42 is again moved to the right by action of cam-actuated bell crank 44. The number of studs 55 on chain '50 will determine the number of rotations of thef-screw-shaft 11 and the movement-of the nuts 9-9, to shift the stops 77 controlled thereby, toward and from one another in a direction crosswise of the wales of the knitted fabric.

. To cause selective engagement of the pawls 25 and 26 before referred to, and thereby determine the direction of rotation o screwshaft 11, '1 preferably employ as shown, a second pattern chain 70, to which step-by-step movement is imparted by the operation of cam-35 on a lever carrying the pawl 71 (Fig. 1) to impart movementeto the ratchet wheel carrying the pattern chain aforesaid having 'studs 72 operating a spring-pressed lever 73 (Figs. 6 and 8). Wires 74 and 75 extending over suitable pulleys, connect the lever 73. to the respective spring-pressed pawls 25 and 26, so that the movement of said lever 73 (as determined-by-the presence or absence of a stud 72, causes-one or the other pawl to engage with its respective ratchet wheel 21 or '22) to impart the. desired direction of rotation "to the screw 11 through the intermittently acting levers 29 and 29 which operate ermits the spring the respective pawls. A spring 74 holds the lever 73 in the position shown when no button 72 is acting on the downwardly projecting lug ofthe lever.

' From the foregoing description it will be seen that the yarn-guide controlling stops employed in my novel attachment may be moved fromand toward each other by direct cam shaft action to cooperate with the usual knitting mechanism in producing the desired spliced or split-seam ornamentation of the adjacent fabric sections, and their relative adjustment from and toward one another automatically controlled and intermittently effected in successive courses. My novel split-seam stops, it will be understood, are employed in producing fabrics having sections of separate yarns of which for illustrative purposes one type is shown in Fig. 10, or spliced areas as shown in my said patent. In the particular illustrative fabric shown in Fig. 10, three yarn carrier rods have been employed for making a split seam fabric, each having a yarn guidesupplying yarn only to its respective section A, B, or G, and my op-' positely movable split seam stops have caused the inter-looping of these yarn sections to form the reversly inclined split seam border lines D.

Each of the carrier bars for sections A and C is stopped on its outward movement by the conventional end stops at the ends of .the machine and on its return movement by a stop 7. The carrier rod for section B has an abutment or abutments moving between stops 7, 7 and striking against one or the other at the ends of its throw. It would also be possible to provide abutments on this last named rod-outside the stops so as to strike alternately against the outer faces of the stops. Additional sections could readily be provided for by equipping differently located abutments so that the travel of the guides would cover different vertical stripes or yarns of the fabric.

Mounted on a stud 98 adjacent the main cam shaft 5 is the usual lever cam 99 which controls the narrowing mechanism, and attached thereto, is an arm 92 (Figs. 11 and 12) which when the lever cam goes into action moves in the direction of the arrow (Fig. 11) against the collar 93 moving therewith the shaft 94 and the block 95 attached to the endthereof, into the path of travel of the collar 96 fixed to the shaft 42 and prevents same from operating. It will thus be seen that during the narrowing of the stocking the shaft 42 which controls the operation of the design mechanism is prevented from working. A spring 97 tends to normally hold the block 95 out of thepath of collar 96.

The purpose of preventing operation of the screw-actuating means at this time arises out of the fact that if such means should happen to operate during narrotilving the sinkers would cut 05 the yarns atlthe fabric and so cause press-offs and seconds;

What I claim is:

1. In a straight knitting machine having cooperating yarn guide carrier bars, a pair of opposed stops for certain of said carrier bars which have a stroke less than the full width of the fabric being knitted, and a reversely threaded spindle for moving said stops toward and from each other to vary the 'stroke' ofthe bars controlled by said stops.

2. In a straight knitting machine having cooperating reciprocatory yarn guide carrier bars, a reversely threaded spindle, stops con nected to the spindle positioned to limit the traverse of certain of the cooperating carrier bars to less than the full width of the cloth being knitted, and pattern controlled means for turning said spindle to vary the distance between said stops.

3. A device as in claim 2, said pattern controlled means being constructed and arranged to turn said spindle either to increase or to decrease the distance between said stops.

4. In a straight knitting machine, yarn guide carrier bars having a stroke less than the full width of the fabric being knitted,

abutments on said carrier bars, a reversely threaded spindle, opposed stops for engagement by said abutments, said stops being operated by the reversely arranged threads of said spindle to vary the distance between them, and pattern controlled means for rotat-ing said spindle.

5. In a straight knitting machine having guides for one or more yarns knitted in for less than the full length of a course, the'combination of carrier bars for said guides, a reversely threaded spindle parallel to said bars, stops in the path of said abutments said stops being connected to the reversely threaded parts of said spindle, and pattern controlled means for rotating said spindle to vary the distance between said abutments.

6. In a straight knitting machine, yarn guide carrier bars including one 'or more bars having a stroke less than the full width of the fabric being knitted, abutments on said carrier bars, a reversely threaded spindle, opposed stops supported on the reversely threaded portions of said spindle for engage- 1 ment by said abutments, and means for rotating said spindle.

'7. In a straight knitting machine having reciprocating yarn guide carrier bars, a reversely threaded spindle, stops connected to the spindle positioned to limit the traverse of certain carrier bars, pattern controlled means for turning said spindle, and means for preventing operation of said means during the narrowing operation.

8. In a straight knitting machine having reciprocating yarn guide carrier bars, a reversely threaded spindle, stops connected to the spindle positioned to limit the traverse bf certain carrier bars to a distance less than the width of the fabric being knitted, pattern controlled means for turning .said spindle in either direction, and means for preventing operation of said means during the narrowing operation.

9. In a straight knitting machine, a set of yarn guide carrier bars, stops for said bars said stops having undercut portions normally out of operative relation to said bars,

means for moving said stops toward and from each other, and means to move the stops so as to bring the undercut portions into operative relation to said bars, thereby permitting delayed additional movement of said bars. a

10. In a straight knitting machine, a set of yarn guide carrier bars, pivoted stops for said bars said stops having undercut portions, means whereby the stops may be caused to approach or recede from each other, and pattern-controlled means to tilt the stops to bring the'undercut portions into operative relation to said bars, thereby'permitting delayed additional movement 0 said bars.

11. In a straight knitting machine, a set of yarn guide carrier bars, a reversely threaded spindle parallel to said bars, nuts on the reversely threaded portions of said spindle, stops operated by said nuts for limiting the movement of said carrier bars said stops having undercut portions, pattern controlled means for rotating the spindle to vary the distance between the stops, and,

means for moving the stops so as to bring the undercut portions into operative relation to said bars thereby permitting delayed additional movement of said bars.

12. In a straight knitting machine, a set operative relation to said bar to permit d e-- layed additional movement of the bar.

14. In a straightknitting mach'ne, a'set of yarn uide carrier bars for dperati yarn gui es travelin less than the in width of the fabric being knitted, a spindle having reversed screw threads, stops operated by said spindle, means ifor turning the spindle in either direction, pattern-controlled means for determining the time of operation of the spindle, and pattern-controlled means for determining the direction of rotation of the spindle. i

15. In a straight knitting machine, aset of reciprocating yarn guide carrier bars in ,cluding' bars, having a stroke less than the];

width of the fabric being knitted, pair of stops for said guides, a reversely threaded spindle extending lengghwise of the machine, the respective stops ing connected to the reversely threaded portion of the spindle for moving the stops simultaneously toward and from each other, pattern controlled means for determining the time for such movement,

and correlated pattern controlled means for determining the direction of.

independently such movement. Y

16, In astraight-knitting machine having a maincam shaft, a set of yarn guide carrier bars,a spindle having reversed screw threads,

stops. connected'to said spindle said stops limiting the tra c1 of the carrier bars, means for turning the spindle in either direction, pattern-controlled'means for determining the time of operation of the spindle including a rod extending lengthwise of the machine, connections from the main cam shaft for moving the rod in one direction, a detentfor holding the rod, and means including a pattern chain of yarn guide carrier bars including one; or

more'bars having a traverse less than the a width of the fabric being knitted, a threaded spindle. a stop for limiting the traverse of a carrier bar in one direction said stop having an undercut portion and being connected to said spindle, means for turning the spindle to move the stop lengthwise of the bar to vary the traverse of the bar, and means ior moving the stop to bring the undercut portion into operative relation to said bar to permit delayed additional movement of the 13. In a straight knitting machine, a set of yarn guide carrier bars including one or more bars having .a traverse less than the width of the fabric being knitted, a threaded spindle, a nut on the spindle, a stop pivotally supported by the nut for limiting the traverse of a carrier bar in one direction said stop having an undercut portion, means for bar, and means for moving the stop on its pivot to bring the undercut portion into for releas'ingthe detent to permit the rod to return.

'17. 'In' a straight knitting machine, a set of yarn guide carrier bars, a spindle having reversed screw threads, stops'connected to the spindle said' 'stops limiting the travel of said carrier bars, reversible pawl and ratchet means-forturning the spindle, pattern-con- -trolledmeans for determining the time of operationof the spindle including a rod extending lengthwise of the machine, connections from the main cam shaft for moving the rod in one direction, a detent for holding it, means including a pattern chain for releasing the detcntt'o permit the rod to return, means for determining the direction of rotation of the spindle including a second rod parallel to the first, means on the first rod for moving the second in one direction, a detent for holdin g the second rod, and connections from said pattern chain for-releasing the second rod.

18. In a straight knitting machine having cooperatingyarn guide. carrier bars, a pair of opposedstops fora carrier bar having a stroke less than the full Width of the fabric. being knitted, and a rod-like element having means to move said stops toward and from each other longitudinally of said element and to hold said stops at various distances from each other. 4

19. In a straight knitting machine having cooperating yarn guide carrier bars, means for making a fabric with sections connected by suture seams including a pair of opposed stops for a carrier bar supplying yarn to one of said sections, and a reversely threaded spindle for moving said stops toward and from each other to vary the stroke of said bar.

20. In a straight knitting machine having cooperating reciprocatory yarn guide carrier bars,means for knitting a fabric with sections connected by suture seams including a reversely threaded spindle, stops connected to the spindle positioned to limit the travel of a carrier bar supplying yarn to one of such sections, and pattern controlled means for turning the spindle to increase or decrease the distance between said stops.

21. In a straightknitting machine having cooperating yarn guide carrier bars, means for knitting a fabric with sections connected by suture seams including a pair of opposed stops for a carrier bar supplying yarn to one such section, and a rod-like element carrying the stops, and means to move said sto s to- \ward and from each other longitudina ly of said element and to hold said stops at various distances from each other.

22. In a full fashioned knitting machine or away-from each other, means for moving a said stops from and towards the rods to ef feet the split-seam interlooping of adjacent fabric sections, and means for intermittently moving said stops to reversely incline the split-seams to,the lines of the wales.

23. In a full fashioned knitting machine comprising a plurality of thread-carrier rods, stop-mechanism for said rods comprising a. screw shaft having reversely-threaded portions carrying oppositely movable splitseam stops adapted to control the split-seam interlooping of adjacent fabric sections, and means for intermittently. actuating said screw in successive courses to reversely incline the split-seams to the lines of'the wales.

In testimony whereof, I have hereunto signed my name.

- RICHARD E. SCHLETTER.

DISCLAIMER dE. S hletter Philadelphia Pa. A'rrrAcnmEN-r ron FLAT-KNITTING MA czii I iis. Patent dated May 21, 1 929. Disclaimer filed January 18, 1936,

by the assignee, Textile Machine Works. Hereby enters this disclaimer to claim 10 of said Letters Patent. [(Micial Gazette February 26, 1 986.]

DISCLAIMER '1,713,62 8.R'ichard E'. Schletter, Philadelphia, Pa. A'r'moHiunN'r non FLAT- KNITTING MACHINES. Patent dated May 21, 1929. Disclaimer filed January 31, 1938, by the assignee, Textile Machine Works.

Hereby enters this disclaimer to claims 1, 3, 14, and 15 of said Letters Patent.

[Ofiiezal Gazette February 22, 1938.]

DISCLAIMER 1,713,628.-Richard E. Schletter, Philadelphia, Pa. ATTACHMENT FOR FLAT-KNIT- TING MACHINES. Patent dated May 21; 1929. Disclaimer filed March 5,

1938, by the assignee, Textile Machine Works. e-

Hereby enters this disclaimer to claim 2 of said Letters Patent.

[Ofic'ial Gazette March 29, 1938.]

DISCLAIM ER 1,713,628.Richard E. Schletter, Philadelphia, Pa. ATTACHMENT FOR FLAT- KNITTING MACHINES. Patent dated May 21, 1929. Disclaimer filed January 31, 1938, by the assignee, Textile ZVIachine Wow/cs. Hereby enters this disclaimer to claims 1, 3, 14, and 15 of said Letters Patent.

[Ofiicial Gazette February 22, 1938.]

DISCLAIMER 1,713,628.Richard E. Sehletter, Philadelphia, Pa. ATTACHMENT FOR FLAT-KNIT- TING MACHINES. Patent dated May 21, 1929. Disclaimer filed March 5, 1938, by the assignee, Textile lllachine Works.

Hereby enters this disclaimer to claim 2 of said Letters Patent.

[Ofiicial Gazette March 29, 1938.] 

